1# SPDX-License-Identifier: GPL-2.0 2# 3# s390/Makefile 4# 5# This file is included by the global makefile so that you can add your own 6# architecture-specific flags and dependencies. Remember to do have actions 7# for "archclean" and "archdep" for cleaning up and making dependencies for 8# this architecture 9# 10# Copyright (C) 1994 by Linus Torvalds 11# 12 13KBUILD_DEFCONFIG := defconfig 14 15LD_BFD := elf64-s390 16KBUILD_LDFLAGS := -m elf64_s390 17KBUILD_AFLAGS_MODULE += -fPIC 18KBUILD_CFLAGS_MODULE += -fPIC 19KBUILD_AFLAGS += -m64 20KBUILD_CFLAGS += -m64 21ifeq ($(CONFIG_RELOCATABLE),y) 22KBUILD_CFLAGS += -fPIE 23LDFLAGS_vmlinux := -pie 24endif 25aflags_dwarf := -Wa,-gdwarf-2 26KBUILD_AFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -D__ASSEMBLY__ 27KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf)) 28KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 29KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY 30KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float 31KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables 32KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-option,-ffreestanding) 33KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g) 34KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,)) 35UTS_MACHINE := s390x 36STACK_SIZE := $(if $(CONFIG_KASAN),65536,16384) 37CHECKFLAGS += -D__s390__ -D__s390x__ 38 39export LD_BFD 40 41mflags-$(CONFIG_MARCH_Z900) := -march=z900 42mflags-$(CONFIG_MARCH_Z990) := -march=z990 43mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109 44mflags-$(CONFIG_MARCH_Z10) := -march=z10 45mflags-$(CONFIG_MARCH_Z196) := -march=z196 46mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12 47mflags-$(CONFIG_MARCH_Z13) := -march=z13 48mflags-$(CONFIG_MARCH_Z14) := -march=z14 49 50export CC_FLAGS_MARCH := $(mflags-y) 51 52aflags-y += $(mflags-y) 53cflags-y += $(mflags-y) 54 55cflags-$(CONFIG_MARCH_Z900_TUNE) += -mtune=z900 56cflags-$(CONFIG_MARCH_Z990_TUNE) += -mtune=z990 57cflags-$(CONFIG_MARCH_Z9_109_TUNE) += -mtune=z9-109 58cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10 59cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196 60cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12 61cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13 62cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14 63 64cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include 65 66# 67# Prevent tail-call optimizations, to get clearer backtraces: 68# 69cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 70 71ifeq ($(call cc-option-yn,-mpacked-stack),y) 72cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK 73aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK 74endif 75 76KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) 77KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) 78 79ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y) 80cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE) 81ifneq ($(call cc-option-yn,-mstack-size=8192),y) 82cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD) 83endif 84endif 85 86ifdef CONFIG_WARN_DYNAMIC_STACK 87 ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y) 88 KBUILD_CFLAGS += -mwarn-dynamicstack 89 KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack 90 endif 91endif 92 93ifdef CONFIG_EXPOLINE 94 ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y) 95 CC_FLAGS_EXPOLINE := -mindirect-branch=thunk 96 CC_FLAGS_EXPOLINE += -mfunction-return=thunk 97 CC_FLAGS_EXPOLINE += -mindirect-branch-table 98 export CC_FLAGS_EXPOLINE 99 cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE 100 aflags-y += -DCC_USING_EXPOLINE 101 endif 102endif 103 104ifdef CONFIG_FUNCTION_TRACER 105 ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n) 106 # make use of hotpatch feature if the compiler supports it 107 cc_hotpatch := -mhotpatch=0,3 108 ifeq ($(call cc-option-yn,$(cc_hotpatch)),y) 109 CC_FLAGS_FTRACE := $(cc_hotpatch) 110 KBUILD_AFLAGS += -DCC_USING_HOTPATCH 111 KBUILD_CFLAGS += -DCC_USING_HOTPATCH 112 endif 113 endif 114endif 115 116# Test CFI features of binutils 117cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1) 118 119KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y) 120KBUILD_CFLAGS += -pipe -Wno-sign-compare 121KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) 122KBUILD_AFLAGS += $(aflags-y) $(cfi) 123export KBUILD_AFLAGS_DECOMPRESSOR 124export KBUILD_CFLAGS_DECOMPRESSOR 125 126OBJCOPYFLAGS := -O binary 127 128head-y := arch/s390/kernel/head64.o 129 130# See arch/s390/Kbuild for content of core part of the kernel 131core-y += arch/s390/ 132 133libs-y += arch/s390/lib/ 134drivers-y += drivers/s390/ 135 136# must be linked after kernel 137drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/ 138 139boot := arch/s390/boot 140syscalls := arch/s390/kernel/syscalls 141tools := arch/s390/tools 142 143all: bzImage 144 145#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... 146KBUILD_IMAGE := $(boot)/bzImage 147 148install: vmlinux 149 $(Q)$(MAKE) $(build)=$(boot) $@ 150 151bzImage: vmlinux 152 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 153 154zfcpdump: 155 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 156 157vdso_install: 158 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 159 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 160 161archclean: 162 $(Q)$(MAKE) $(clean)=$(boot) 163 $(Q)$(MAKE) $(clean)=$(tools) 164 165archheaders: 166 $(Q)$(MAKE) $(build)=$(syscalls) uapi 167 168archprepare: 169 $(Q)$(MAKE) $(build)=$(syscalls) kapi 170 $(Q)$(MAKE) $(build)=$(tools) kapi 171 172# Don't use tabs in echo arguments 173define archhelp 174 echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' 175 echo ' install - Install kernel using' 176 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 177 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 178 echo ' install to $$(INSTALL_PATH)' 179endef 180